 /*******************************************************************************
  * Copyright (c) 2005, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.preferences;

 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.resource.JFaceResources;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Shell;

 /**
  * The ViewSettingsDialog is an abstract class that
  * provides some common functionality for view preferences.
  *
  * @since 3.1
  */
 public class ViewSettingsDialog extends Dialog {
     
     private static int DEFAULTS_BUTTON_ID = 25;
     
     /**
      * Create a new instance of the receiver.
      * @param parentShell
      */
     public ViewSettingsDialog(Shell parentShell) {
         super(parentShell);
     }

     /* (non-Javadoc)
      * @see org.eclipse.jface.dialogs.Dialog#buttonPressed(int)
      */
     protected void buttonPressed(int buttonId) {
         if (buttonId == DEFAULTS_BUTTON_ID) {
             performDefaults();
         }
         super.buttonPressed(buttonId);
     }

      /**
      * Performs special processing when this dialog Defaults button has been pressed.
      * <p>
      * This is a framework hook method for subclasses to do special things when
      * the Defaults button has been pressed.
      * Subclasses may override, but should call <code>super.performDefaults</code>.
      * </p>
      */
     protected void performDefaults() {
         //Do nothing by default

     }

     /* (non-Javadoc)
      * @see org.eclipse.jface.dialogs.Dialog#createButtonsForButtonBar(org.eclipse.swt.widgets.Composite)
      */
     protected void createButtonsForButtonBar(Composite parent) {
         parent.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

         createButton(parent, DEFAULTS_BUTTON_ID, JFaceResources.getString("defaults"), false); //$NON-NLS-1$

         Label l = new Label(parent, SWT.NONE);
         l.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

         l = new Label(parent, SWT.NONE);
         l.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

         GridLayout layout = (GridLayout) parent.getLayout();
         layout.numColumns += 2;
         layout.makeColumnsEqualWidth = false;

         super.createButtonsForButtonBar(parent);
     }

 }

